Aurora over Scoresby, GreenlandScoresby Sound in East Greenland, late September, and the temperature had dropped to somewhere around minus ten. The moon was already up and flooding the fjord with cold light when the aurora started. No slow build. It just appeared, this bright green arc rolling across the northern sky while the moon held its ground to the left of the frame. The sea was dead calm, which is unusual for Scoresby. A thick band of fog had settled right along the horizon,